Literature DB >> 12098269

General synthesis of persistent trityl radicals for EPR imaging of biological systems.

T Jagadeeswar Reddy1, Tetsuo Iwama, Howard J Halpern, Viresh H Rawal.   

Abstract

In this paper we describe the syntheses of the tetraoxygenated triarylmethyl (trityl) radical 14 and the tetrathiatriarylmethyl (trityl) radicals 15 and 16. The syntheses include new and improved preparations of the key intermediate compounds 1 and 2. The new route to compound 2 is noteworthy for its efficiency and its avoidance of the highly toxic compound phosgene as well as the isolation of the air-sensitive 1,2,4,5-benzenetetrathiol.

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Year:  2002        PMID： 12098269     DOI： 10.1021/jo011068f

Source DB:  PubMed          Journal:  J Org Chem        ISSN： 0022-3263            Impact factor:   4.354


  51 in total

1.  2H-DNP-enhanced 2H-13C solid-state NMR correlation spectroscopy.

Authors:  Thorsten Maly; Loren B Andreas; Albert A Smith; Robert G Griffin
Journal:  Phys Chem Chem Phys       Date:  2010-05-11       Impact factor: 3.676

2.  Synthesis, structure, and EPR characterization of deuterated derivatives of Finland trityl radical.

Authors:  Ilirian Dhimitruka; Olga Grigorieva; Jay L Zweier; Valery V Khramtsov
Journal:  Bioorg Med Chem Lett       Date:  2010-05-07       Impact factor: 2.823

3.  Synthesis of a water-soluble 1,3-bis(diphenylene)-2-phenylallyl radical.

Authors:  Eric L Dane; Timothy M Swager
Journal:  J Org Chem       Date:  2010-05-21       Impact factor: 4.354

4.  Multiple-stepped Zeeman field offset method applied in acquiring enhanced resolution spin-echo electron paramagnetic resonance images.

Authors:  Payam Seifi; Boris Epel; Colin Mailer; Howard J Halpern
Journal:  Med Phys       Date:  2010-10       Impact factor: 4.071

Review 5.  Dynamic nuclear polarization at high magnetic fields.

Authors:  Thorsten Maly; Galia T Debelouchina; Vikram S Bajaj; Kan-Nian Hu; Chan-Gyu Joo; Melody L Mak-Jurkauskas; Jagadishwar R Sirigiri; Patrick C A van der Wel; Judith Herzfeld; Richard J Temkin; Robert G Griffin
Journal:  J Chem Phys       Date:  2008-02-07       Impact factor: 3.488

6.  Highly stable dendritic trityl radicals as oxygen and pH probe.

Authors:  Yangping Liu; Frederick A Villamena; Jay L Zweier
Journal:  Chem Commun (Camb)       Date:  2008-08-15       Impact factor: 6.222

7.  Frequency bandwidth extension by use of multiple Zeeman field offsets for electron spin-echo EPR oxygen imaging of large objects.

Authors:  Payam Seifi; Boris Epel; Subramanian V Sundramoorthy; Colin Mailer; Howard J Halpern
Journal:  Med Phys       Date:  2011-06       Impact factor: 4.071

8.  Generation of Trityl Radicals by Nucleophilic Quenching of Tris(2,3,5,6-tetrathiaaryl)methyl Cations and Practical and Convenient Large-Scale Synthesis of Persistent Tris(4-carboxy-2,3,5,6-tetrathiaaryl)methyl Radical.

Authors:  Olga Yu Rogozhnikova; Vladimir G Vasiliev; Tatiana I Troitskaya; Dmitry V Trukhin; Tatiana V Mikhalina; Howard J Halpern; Victor M Tormyshev
Journal:  European J Org Chem       Date:  2013-06-01

9.  Triarylmethanols bearing bulky aryl groups and the NOESY/EXSY experimental observation of two-ring-flip mechanism for helicity reversal of molecular propellers.

Authors:  Victor M Tormyshev; Alexander M Genaev; Georgy E Sal'nikov; Olga Yu Rogozhnikova; Tatiana I Troitskaya; Dmitry V Trukhin; Victor I Mamatyuk; Dmitry S Fadeev; Howard J Halpern
Journal:  European J Org Chem       Date:  2012-01

10.  Characterization of the Binding of the Finland Trityl Radical with Bovine Serum Albumin.

Authors:  Yuguang Song; Yangping Liu; Wenbo Liu; Frederick A Villamena; Jay L Zweier
Journal:  RSC Adv       Date:  2014-01-01       Impact factor: 3.361
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